Princess Torte

In a bowl beat together eggs and 2/3 cup sugar until the mixture is very light. Sift together potato flour and flour and baking powder. Add vanilla to the egg mixture and fold in the flour mixture. Pour the batter into two 9-inch round cake pans, buttered and floured, and bake the layers in a moderate oven (350 F) for 15 minutes, or until they test done. Let the layers cool on a wire rack for 5 minutes and turn them out on the rack to cool completely. In a bowl beat together egg yolks and sugar until the mixture is light. In a small bowl sprinkle gelatin over cold water to soften and set it over hot water until it is dissolved. Add the gelatin to the yolk mixture with vanilla. Fold in heavy cream. Spread 1 cake layer with some of the cream, top it with the other layer, and spread the top and sides with the remaining cream. In a bowl combine one almond paste, confectioners' sugar, green food coloring, and egg white until the mixture is smooth. Form it into a ball, sprinkle it lightly with sifted confectioners' sugar, and wrap it in wax paper. Chill the marzipan for 1 hour. Sprinkle a 16-inch piece of wax paper with sifted confectioners' sugar and put the marzipan ball on it. Top the ball with another piece of wax paper and roll it out into a 15-inch circle. Remove the top piece of wax paper, lay the marzipan, paper side up, on the cake, and peel off the paper. Press the marzipan against the sides of the cake and trim off any excess around the bottom. Dust the top of the torte with sifted confectioners' sugar.